Tests and simulation for dynamic digging response of buried steel gas pipelines under excavator loading

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (1) : 230-239.

XU Taolong1, YAO Anlin1, ZENG Xiangguo2, LI Youlü1, LI Xing2

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Abstract

Based on the published results recently, the dynamic responses of steel gas pipelines under various digging cases were investigated here. Total 21 static/dynamic test groups with different driving cylinders, different digging heights, different digging angles and digging teeth were designed and conducted. The excavator-pipeline-soil multi-body dynamic model was established by using ADAMS. STEP function control and Script simulation control were realized according to cylinders pressure and displacement measured data to reproduce typical test cases and to acquire dynamic/ static digging loads, then the dynamic digging load factor was determined. Finally, using the static/dynamic loading extracted from simulation, the static/dynamic strains of pipeline measured points were obtained with ANSYS/LS-DYNA, they agreed well with the measured test data. Here, the quantitative identification for dynamic digging load factors under multiple cases was conducted by using tests and simulation methods, and the results provided a reference for designing prevention and control measures against digging damages of buried steel gas pipeline network under complicated environment.

Key words

excavator / buried gas pipeline / dynamic digging response / dynamic loading factor / numerical simulation

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XU Taolong1, YAO Anlin1, ZENG Xiangguo2, LI Youlü1, LI Xing2. Tests and simulation for dynamic digging response of buried steel gas pipelines under excavator loading[J]. Journal of Vibration and Shock, 2017, 36(1): 230-239

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